Effect of Low Glycaemic Index Diet on Blood Glucose Control in Chinese Type 2 Diabetic Patients

NCT ID: NCT01542554

Last Updated: 2012-08-23

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

UNKNOWN

Clinical Phase

NA

Total Enrollment

44 participants

Study Classification

INTERVENTIONAL

Study Start Date

2012-03-31

Study Completion Date

2012-12-31

Brief Summary

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The purpose of this study is to investigate the effect of low glycaemic diet on blood glucose control in Chinese type 2 diabetic patients.

Detailed Description

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Glycaemic index (GI) is the measurement of post-meal blood glucose rise cause by ingestion of carbohydrate. For the same amount of carbohydrate, food with lower GI value cause a lower post- meal rise in blood glucose concentration in both normal and diabetic patients. Meta-analysis of randomized controlled trial has showed that low GI diet can achieve an additional reduction of A1c by 0.4% when compare with usual diabetic diet. Furthermore, various diabetes associations have already endorsed the use of low GI diet in the management of diabetes.

Hong Kong Chinese obtain most of their carbohydrate intake through consumption of rice or rice related foods, which are considered as having high GI value. In addition, it has been demonstrated that Asian have higher post-prandial rise in blood glucose than Caucasian after consuming the same amount of carbohydrate. When the above two factors add together, we expect our local type 2 diabetic patients are suffering from significant post-prandial hyperglycaemia, which in turn translate into elevated 24-hour hyperglycaemia and A1c.

However, nearly all studies about glycaemic index and diabetes are conducted in Caucasian. It is unclear about the benefit in Chinese patients with type 2 diabetes who are currently having diet with high GI value.

We therefore hypothesized that low GI diet may improve blood glucose control in Chinese type 2 diabetic patients. To test this hypothesis, we plan to conduct this randomized controlled trial about low GI diet in Chinese diabetic patients.

Conditions

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Diabetes Mellitus

Keywords

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Diabetes mellitus Chinese Glycaemic index

Study Design

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Allocation Method

RANDOMIZED

Intervention Model

PARALLEL

Primary Study Purpose

TREATMENT

Blinding Strategy

NONE

Study Groups

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Low glycaemic index diet

Group Type EXPERIMENTAL

Low glycaemic index diet

Intervention Type OTHER

Diabetic subjects will be given dietary advice with emphasis on low glycaemic index diet

Usual diabetic diet

Group Type ACTIVE_COMPARATOR

Usual diabetic diet

Intervention Type OTHER

Diabetic subjects will be given dietary advice without mention about glycaemic index

Interventions

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Low glycaemic index diet

Diabetic subjects will be given dietary advice with emphasis on low glycaemic index diet

Intervention Type OTHER

Usual diabetic diet

Diabetic subjects will be given dietary advice without mention about glycaemic index

Intervention Type OTHER

Eligibility Criteria

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Inclusion Criteria

1. Chinese Type 2 diabetic patient.
2. Already performing self monitoring blood glucose ( SMBG ) with pre- and post-meal readings.
3. At least 50% of 2hr post-meal capillary blood glucose values are \> 9 mmol/L.
4. A1c between 7.0 to 8.0% within 2 weeks of randomization.
5. Next follow-up is scheduled to at least 12 weeks or more if currently follow-up in TWEH.
6. On stable dose of anti-diabetic drug in the preceding 10 weeks.
7. No change in anti-DM drug in the next 10 week.
8. At least 18 years old.
9. Can read and understand consent form written in Chinese.
10. Can give informed consent.

Exclusion Criteria

1. Unexplained hypoglycaemia in last 4 weeks.
2. Using rapid onset insulin ( such as Humalog, Novorapid, Actrapid HM, Mixtard HM, Novomix and Humalog Mix ).
3. Using acarbose.
4. Anaemia.
5. Known thalassaemia.
6. Suspected or confirmed iron deficiency.
7. On warfarin.
8. Renal impairment with serum creatinine \> 150 umol/L
9. Active medical illness, such as hepatitis, malignancy, infection, inflammatory arthritis, etc.
10. Unable to follow low glycaemic index diet.
11. Currently participate in other study.
12. Mentally or cognitively disable.
13. Pregnant or lactating women.
14. Hospital Authority or TWEH staff.
Minimum Eligible Age

18 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

No

Sponsors

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Hospital Authority, Hong Kong

OTHER_GOV

Sponsor Role lead

Responsible Party

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Ace Lee

Doctor

Responsibility Role PRINCIPAL_INVESTIGATOR

Principal Investigators

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Ace Lee, MBBS

Role: PRINCIPAL_INVESTIGATOR

Department of Medicine and Rehabilitation, Tung Wah Eastern Hospital, Hospital Authority, Hong Kong

Locations

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Tung Wah Eastern Hospital, Hospital Authority

Hong Kong SAR, Hong Kong SAR, China

Site Status RECRUITING

Countries

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China

Central Contacts

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Ace Lee, MBBS

Role: CONTACT

Phone: 852-2162 6888

Email: [email protected]

Marcus Lai, MSc, RD

Role: CONTACT

Phone: 852-2162 6888

Email: [email protected]

Facility Contacts

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Ace Lee, MBBS

Role: primary

References

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Brand-Miller J, Hayne S, Petocz P, Colagiuri S. Low-glycemic index diets in the management of diabetes: a meta-analysis of randomized controlled trials. Diabetes Care. 2003 Aug;26(8):2261-7. doi: 10.2337/diacare.26.8.2261.

Reference Type BACKGROUND
PMID: 12882846 (View on PubMed)

Miller JB, Pang E, Bramall L. Rice: a high or low glycemic index food? Am J Clin Nutr. 1992 Dec;56(6):1034-6. doi: 10.1093/ajcn/56.6.1034.

Reference Type BACKGROUND
PMID: 1442654 (View on PubMed)

Venn BS, Williams SM, Mann JI. Comparison of postprandial glycaemia in Asians and Caucasians. Diabet Med. 2010 Oct;27(10):1205-8. doi: 10.1111/j.1464-5491.2010.03069.x.

Reference Type BACKGROUND
PMID: 20873364 (View on PubMed)

Jenkins DJ, Kendall CW, McKeown-Eyssen G, Josse RG, Silverberg J, Booth GL, Vidgen E, Josse AR, Nguyen TH, Corrigan S, Banach MS, Ares S, Mitchell S, Emam A, Augustin LS, Parker TL, Leiter LA. Effect of a low-glycemic index or a high-cereal fiber diet on type 2 diabetes: a randomized trial. JAMA. 2008 Dec 17;300(23):2742-53. doi: 10.1001/jama.2008.808.

Reference Type BACKGROUND
PMID: 19088352 (View on PubMed)

Other Identifiers

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HKEC-2011-080

Identifier Type: -

Identifier Source: org_study_id